Exam-style question
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Explain how the processor, main memory, address bus, data bus, control bus and I/O controllers communicate as part of a computer system. Include the meaning of addressable memory.
Model answer
What a good answer should say
- The processor communicates with main memory and I/O controllers using buses.
- The address bus carries the address identifying the memory location or component involved in an operation.
- The data bus carries the data being transferred.
- The control bus carries control signals that coordinate the operation between the components.
Explanation
Why this works
A strong answer identifies the distinct purpose of each bus and relates the components rather than describing the buses as interchangeable. It should also state that addressable memory consists of individually identifiable locations accessed using addresses.
Common mistake
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